Standard Application With Hart Functionality - ABB Endura APA592 Operating Instruction

Endura APA592
pH / Redox (ORP) transmitter

4.8.2 Standard Application with HART Functionality

Adding resistance R
250
 U
U + 0.02A x (R
Smin Mmin
Where:
U – Minimum operating voltage of transmitter
Mmin
(refer to technical data for transmitter)
U – Minimum supply voltage of power supply/SPS input
Smin
R – Line resistance between transmitter and power supply
Ltg
R – Resistance for HART functionality
250
Fig. 4.8 Standard Application with HART Functionality
34
increases the minimum supply voltage:
+ R )
Ltg 250
Transmitter
+
U
Mmin
–
R +
250
U
Smin
–
R
Ltg
SPS Input with Supply
4 Electrical Installation
Control Room
Power Supply /
OI/APA592–EN Rev. E